A user's CRT display is not displaying colors correctly. Turning the display to the right or left sometimes temporarily corrects the problem. Which of the following should the technician check?

A video card driver issue would produce consistent color problems unaffected by physically moving the monitor, as software faults do not respond to cable repositioning.

The CRT power cable delivers electrical power only and has no role in transmitting the video signal that determines color output.

CRT monitors connect to the video card via a VGA (DB-15) cable whose pins can loosen or corrode over time. Rotating or repositioning the monitor shifts the cable, temporarily re-establishing the connection and correcting color output. This is a hallmark symptom of a loose or damaged video cable and should be the first component checked.

The OSD is an internal menu for adjusting display settings and would not be influenced by physically rotating the entire monitor unit.